In October, an Islamist faction in Derna pledged loyalty to ISIS, and began calling itself ISIS, which allowed it to attract a large number of new recruits, and expand into several other cities.

The extent of the relationship between ISIS and its affiliate has been a matter of a lot of speculation, but US officials say several ISIS leaders are known to have traveled to Libya to advise this affiliate and help them organize.

The State Department also raised its estimate of the number of ISIS fighters in Libya, saying they believe the faction has between 1,000 and 3,000 fighters there. This may be an underestimation, as neighboring Tunisia alone estimates some 4,000 of their citizens are fighting for the Islamists in Libya.

I begin to understand Darth Vader's permanent frustation (going so far as to terminate his failing Admirals with extreme prejudice on air)

Salem

It is total speculation and just guessing.The o called ISIS in Libya numbers few hundreds at the most.And many are nothing but people allied with Hafter claiming to be ISIS in order to get western support for Hafter side.Hafter warplanes have attacked the forces that are battling ISIS faction in Syrte which mostly composed of former Qaddafi loyalists .
"Isis in Libya: Muammar Gaddafi's soldiers are back in the country and fighting under the black flag of the 'Islamic State' " http://www.independent.co.uk/news/world/middle-ea…
In an interview with the Egyptian Dream2 TV channel, former Libyan official Ahmad Qadhaf Al-Dam,Qadafi cousine, said that he supported ISIS, which was composed of "pious young men." "This enterprise should have been carried out 50 years ago," said Al-Dam, a cousin of former Libyan leader Mu'ammar Al-Qadhafi. The interview aired on January 17, 2015.

Richard

And Obama will not take any responsibility on the damage that he did to this country. Enforcing a no fly zone by blowing up Qadaffi tanks and troops on the ground.